Means for regulating the stroke of pumps.



ERIK ANTON RUNDLF, oE...sT`ooKHoLM, SWEDEN.

MEANS Eon EEGULATING THE STROKE or rUMPs.

Specification of To all ui/winz'f may concern.' Y

Be it knownthat I, ERIK ANTON RUND- a subject of the King of Sweden,residing. at- Stockholm, lin the Kingdom of Sweden, have invented newand useful Improvements in Means for Regulating the` Stroke of Pumps, ofwhich the following: is a specification7 reference being had to thedrawing accompanyingand forming a part hereof.l

This invention relates to means for varying the length of stro-ke ofpumps, especially for-internal combustion engines, and

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more particularly to stroke varying devices of the said kind in whichthe pumppiston or driven member is actuated by a reciprocatingmembersupported and mounted so as to be able to oscillate about acenter.

The object of the Iinvention is to provide a stroke varying device ofthe said lkind vwhich is simple in construction and reliable in working,and the invention consists, chiefly, in that the varying of the pumpstroke is eifected by raising or lowering a supporting member forthe.acti,iating member, whereby the distance between the center ofoscillation of the reciprocating member and its point of contact withthe driven member,v counted in the direction of movement of the saidlatter member, is correspondingly varied.

The invention further comprises the constructions and combinations ofparts hereinafter more particularly described.

In the drawing, Figure 1 is a side elevan tion of one embodiment ot myinvention. Fig. 2 is asimilar .view of a modified construction.

Referring tol Fig. yl of the drawing, a is the piston of a fuel pump j),and is the member actuating thesaid pump piston, said member beingadapted -to swing about a fulcrum c on a member 0 movable toward andaway from the piston a., for instance a slide movable in guides (notshown) and actuatedv by a cam or otherwise. The actuating member b issupported and guided by a member (l supported .in such a manner thatitmay be raised or lowered, for instance by al lever m and a spring n, asclearly shown in the drawing. The pump pistona `has an abut` ment'surface `e which inv the embodiment shown extends at right anglestothedirectionof movement of the piston. At each stroke of thereciprocating'member its forwardly tapering end strikes the surface eLetters raient. `Paren'dara1r.4., 191 3.

Application filed January 10, 1910.V Serial No. 537,307.

and presses the piston inwardfv Then the member (l takes up the positionshown in the connectthe centerof oscillation of the reciprocating memberwith the end f thereof d\ coincides with the direction of movement ofthe pump piston, in which'case the length of-stroke is the greatestpossible. It, on the the member Z) is caused to swing downward ber (Z1the projection of the said line on the direction of movement of the pumppiston,

ter,is decreased.

The member may be shaped otherwise at. the end than described, andsupported directly by spring fn and lever /L for instance such as shownin Fig. Q, where the end g has the form of an arc which -is eccentricthe swinging movement-ot' the member the ditterent points on the surfaceotl thearc g will contact with the abutment surfaceA e ot' the pumppiston a and on account of the ec centricity vof the arc the variationof movement of the pump piston for a given swing;- of the member bwillbe greater .than in the construction shown in Fig. l, for theeccentricity of the arcis so constructed that for the same angularmotion of the member b. in Fig. 1 and in Fig. 2 the end of said mearbei.' lwill recede vfarther oit from the surfacie e in Fig. Q- than theabove mentioned projection of the connection line in Fig. 1 de creases.

vThen the regulating device is used in engines having two or morecylinders. a pump with its operating members Z), l', and used-with eachcylinder, and the reciprocat# ing members l) corresponding to thedifferent cylinders are all supported by a common member m1. .Accordingto Fig. 1. this mem ber isv swingably supportedv at 71r and connected bysprings 'nv to each separate supporting plane (Z. Preferably, the conne@tion is adjustable,.for instance by nuts i', as shown lin the drawii'ig.The turning' of the member m may b effected by a common pendulumgovernor driven 'by the engine. In engines having two or more cylinders,in which the supply of fuel takes place at. dit'- ferenttimes,thelregulating members Z) are 'driven' in such a manner that theywill operate the pump pistons at correspondingly different times, At,each time one or more drawing', the line which may be supposed to'contrary,A the member al is lowered so that by gravity, always inContact with the me1n-.

and thereby the length of stroke ot' the lat`- lin relation to thecenter of oscillation. 'In

ci: the members Will therefore be in contact with their correspondingpump pistons while the other menibers Z) are treej fi. fout ot Contactwith their pump pistons. When a member is in contact with its pumppiston, the friction between the said memners is so great that anadjustment of the member from the governor cannot take place. In orderthat the members retained by friction at the pump pistons shall. not.prevent the free membersv from being adjusted the springs n provide anelastic connection.' It will be easily understood that the free membersb are immediately adjusted according to the position ot' the 2governorWhereas those members L which are engaged by the pump pistons are notadjusted before they leave the same.

Iiinally, it should be noted that the arrangement described enables aconvenient stopping oi" internal. combustion engines having two or morecylinders. The stopping; may be eiifected by simply pressing i. themember' ym, by hand, thus causing all Lne sliding planes d to be swungdown- Ward suiiiciently for causingall the members b to move out ofaction.

Finally, I Wish it to be understood that .the invention is not limitedto use i3 connection With fuel pumps for internal combustion engines,for obviously itmay be used for controlling pumps or other devices ofany kind.

I claim: f l

l. In a pump, the combination of a pis ton, a member adapted toreciprocatetoward and away from the said piston in substantially thesame direction as the line of travel of the piston', an intermediatepart swingably connected toA the said reciprocating member and adaptedto Contact With said piston7 a movable supporting member for the saidswingable part, and means for automatically adjusting the position ofthe said supporting member in such a manner as to cause the swingablepart to perform a swinging movement about its ulcrum, by which the pumpstroke is correspondingly cl i an ged.

-ivard and away 'from the said piston in substantiall)rv the samedirection as the line of travel of the piston, an intermediate partsivingably connected to the said reciprocating member and adapted tocontact 'with said piston7 a movable supporting member for the saidsnfingable part, aa governor, and

an adjustable connection between the saidgovernor and the supportingmember aforesaid. n

l. In a pump, the combination of a piston7 a- .spring acting on the saidpiston for moving it outward7 a member adapted to reciprocate toward andaway from the said piston in substantially the same direction as theline of travel of the piston, an intermediate pun'mbperating partsvvingably con-- nected to vthe said reciprocating member and adapted toContact with said piston, a movi able supportingmember for the saidswingable part, and means tor automatically adjusting the position ofthe said support? ingl member in such a manner as to cause the swingablepart to perform a swinging movement about its ulcrnm, thecoperatingabutment surfaces of the actuating part and of the pump pistonbeing so arranged relatively 'to each other that, when the actuatingpart strikes the pump piston, the latter acts to press the formeragainst its supporting` member.

ERIK l-LN'IN RUNDLF.

Viitnesses liuc. filimnsnn, Kain; Ennesimo.

